Garth began his broadcasting career at radio station CKX in Brandon, Manitoba, in 1952.
Moving to CKCK-TV Regina, Saskatchewan, in 1957, Garth again became involved with the reporting and presentation of daily news broadcasts.
He served two terms as President of the Regina Press Club and was Vice Chairman of Deer Lodge Centre.
In the federal election of 1988 Garth contested the riding of Winnipeg South Centre for the now defunct Progressive Conservative Party of Canada.
When he failed to win election he returned to the CBC until appointed by the Mulroney government to the Canadian Radio-television and Telecommunications Commission as the first Regional Commissioner for Manitoba and Saskatchewan, a position he held for five years till 1998 when he retired.